If you do not have a prescription, you can still buy these products and pay with your
credit card, however they will not be FSA reimbursable

Why Do Some Products Require a Prescription?

The I.R.S. Makes the Rules

FSA eligibility rules are determined by the Internal Revenue Service (IRS), we merely
adhere to those rules. Starting in 2011, over-the-counter (OTC) pharmaceuticals with
active medicinal ingredients (e.g. ibuprofen) will now require a doctor's prescription in
order to be eligible for reimbursement from your flexible spending account.